Smelting-furnace.



'No. 718,726. PATENTED JAN. 20, 1903. F. B. PETTENGILL & E. NICHOLSON.

SMELTING FURNACE. APPLICATION FILED P513. 7 1902.

NO MODEL.

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UNITE STATES PATENT OFFICE.

FREDERICK B. PETTENGILL AND EDWARD NICHOLSON, OF LOS ANGELES,CALIFORNIA, ASSIGNORS TO OIL BLAST FURNACE SMELTING COMPANY, OF LOSANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

SMELTlNG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 718,726, dated January20, 1903.

. Application filed February '7, 1902. Serial No. 93,082. (No model.)

To (ZZZ whom it nwty concern.-

Be it known that we, FREDERICK B. PETTEN- GILL and EDWARD NIoHoLsoN,citizens of the United States, residing in Los Angeles, in the county ofLos Angeles, State of California, have invented new and usefulImprovements in smelting-Furnaces, of which the following is aspecification.

Our invention relates to smelting-furnaces in which the material ismelted by a blastflame; and the objects thereof are to produce a furnaceof simple construction and of great efficiency. We accomplish theseobjects by the furnace described herein and illustrated in theaccompanying drawings, forming a part hereof, in which- Figure 1 is avertical longitudinal central section of our furnace. Fig. 2 is across-section on the line 2 2 of Fig. 1 looking in the directionindicated by the arrow.

In the drawings, A is the stack, the bottom portion of which forms thesmelting-chamber B. Above the smelting-chamber is a port closed by door0, through which the material to be smelted is fed into the chamber.Connected with the smelting-chamber is combustion-chamber D, the bottomof which forms receptacle E for the reception of the molten material,which runs from the smelting-chamber thereinto through channel F, whichconnects the hearth of the smeltingchamber therewith. The sides of thesmelting-chamber and the top and sides of the combustionchamber arelined with lining which consists of tubes H, connected to hollow headersI, which tubes and headers are supplied with water through pipe J. Thewater-tubes are spaced apart, so that the fire-brick projecttherebetween, (most distinctly shown in Fig. 2,) so that the lining ofsaid chamber is a composite one, being partly a water-jacket and partlya fire-brick lining. Any other refrac- Lory material may be interposedbetween the tubes.

lie in the fact that it does not use up as much heat as a completewater-jacket lining, has the heat-resisting qualities thereof, and ischeaper.

K and L are tap-holes provided for drawing off the slag and moltenmetal, respectively. A pipe M carries the steam formed in the Theadvantages of this kind of lining tubes and headers to a boiler. (Notshown.) Projecting into the front of the combustionchamber ishydrocarbon-burner N, by means of which a blast-flame is projectedagainst the material to be smelted.

' O and P are the steam and oil pipes which supply the fuel to theburner.

By having the molten-metal receptacle in the bottom of thecombustion-chamber it is subjected to great heat, and a large amount ofmolten metal and slag may be retained therein, and the trouble offrequent drawings oif are thereby obviated. As many combustion-chambersmay beconnected with the smelting-chamber as may be desired.

Having described our invention, what We claim as new, and desire tosecure by Letters Patent, is-

1. A smelting-furnace comprising a smelting-chamber and acombustion-chamber in communication therewith,said chambers having acomposite lining of spaced water-tubes and fire-brick between saidtubes; said tubes and brick alternating and forming the interior surfaceof said chambers.

2. A smelting-furnace, comprising a smelting-chamber having a compositelining around the sides thereof, said lining being composed of spacedwater-tubes connected to hollow headers, and fire-brick therebetween;and a combustion-chamber in communication with the smelting-chamber,having a composite lining around the sides and top thereof, composed ofspaced water-tubes connected to hollow headers and fire brick betweensaid tubes.

3. In a smelting-furnace, a lining for the smelting-chamberthereof,composed of spaced water-tubes, and refractory materialinterposed between and back of said tubes, the said tubes and materialalternating and forming the interior surface of said chamber.

In witness that we claim the foregoing we have hereunto subscribed ournames this 31st day of January, 1902. I

FREDERICK B. PETTENGILL.

EDWARD NICHOLSON.

Witnesses:

G. E. HARPHAM, HENRY T. HAZARD.

